单项选择题 图示简支梁受到集中力作用（l = a+b），下列结论错误的是（  ）。

未知题型 Why does the author say 'spring cleaning can't wait'?A.Because there will be more activities when it gets warmerB.Because the air is fresher and the breeze is lighter.C.Because the whole family is full of energy at spring timE.D.Because the snow is melting and the ground is thawing.

未知题型 'Harrington... made sure she was never off executives' radar' (Paragraph Four) means that she______.A.herself wanted to be a company executiveB.meant to hire executives to run the businessC.meant to keep her management knowledge and skillsD.focused on the management of the bakery business